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Bess [88]
3 years ago
11

Which level of classification includes the most species

Biology
2 answers:
Mila [183]3 years ago
5 0
Domain is the highest level of classification. Domain includes EVERY species. 
ICE Princess25 [194]3 years ago
4 0

Domain is the highest level of classification. Domain includes EVERY species.

Explanation:

According to the Woese system, launched in 1990, the tree of life consists of three domains three domains are the Archaea, the Bacteria, and the Eukarya. Prokaryotic organisms apply either to the domain Archaea or the domain Bacteria; organisms with eukaryotic cells apply to the domain Eukarya.

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What are the applications of human nervous cells?
Andreyy89

The human body is made up of trillions of cells. Cells of the nervous system, called nerve cells or neurons, are specialized to carry "messages" through an electrochemical process. The human brain has approximately 86 billion neurons. To learn how neurons carry messages, read about the action potential.

Neurons come in many different shapes and sizes. Some of the smallest neurons have cell bodies that are only 4 microns wide. Some of the biggest neurons have cell bodies that are 100 microns wide. (Remember that 1 micron is equal to one thousandth of a millimeter!).

Neurons are similar to other cells in the body because:

Neurons are surrounded by a cell membrane.

Neurons have a nucleus that contains genes.

Neurons contain cytoplasm, mitochondria and other organelles.

Neurons carry out basic cellular processes such as protein synthesis and energy production.

However, neurons differ from other cells in the body because:

Neurons have specialize cell parts called dendrites and axons. Dendrites bring electrical signals to the cell body and axons take information away from the cell body.

Neurons communicate with each other through an electrochemical process.

Neurons contain some specialized structures (for example, synapses) and chemicals (for example, neurotransmitters).

The Neuron

neuron

One way to classify neurons is by the number of extensions that extend from the neuron's cell body (soma).

bipolar neuron

Bipolar neurons have two processes extending from the cell body (examples: retinal cells, olfactory epithelium cells).

Pseudounipolar cells (example: dorsal root ganglion cells). Actually, these cells have 2 axons rather than an axon and dendrite. One axon extends centrally toward the spinal cord, the other axon extends toward the skin or muscle.

Multipolar neurons have many processes that extend from the cell body. However, each neuron has only one axon (examples: spinal motor neurons, pyramidal neurons, Purkinje cells).

Neurons can also be classified by the direction that they send information.

Sensory (or afferent) neurons: send information from sensory receptors (e.g., in skin, eyes, nose, tongue, ears) TOWARD the central nervous system.

Motor (or efferent) neurons: send information AWAY from the central nervous system to muscles or glands.

Interneurons: send information between sensory neurons and motor neurons. Most interneurons are located in the central nervous system.

Check out the Gallery of Neurons to see some pictures of real neurons or "Sidewalk Cells" to see photographs of neurons on the street.

Hear It

"Neuron" | "Axon" | "Dendrite" |

"Nissl" | "Mitochondria" | "Endoplasmic reticulum"

There are several differences between axons and dendrites:

5 0
3 years ago
What is the process of taking material into the cell by means of infoldings of the cell membrane
Nadusha1986 [10]

Endocytosis is your answer

8 0
2 years ago
Which of the following examples describes convergent evolution?
topjm [15]

Answer: Option E (B and D are the only examples.

Mediterranean ecosystem with hot dry summer and fire can be found on various continents across the globe. Plants in these ecosystem have evolve similar adaptations to survive these circumstances.

Echidnas are egg laying mammals that live in Australia and new Guinea. They are sometimes known as spiny anteaters since they are covered in spines and mostly eat ants and termites. As such they resemble south American anteaters and hedgehogs but are not closely related to them. Instead echidnas descended from an aquatic platypus like ancestor.

Explanation:

Divergent evolution is a process where different organisms with different anscetors evolve independently and develop similar traits due to their adaptation to similar environment.

Another example is the similarities between hummingbird and hummingbird moth, the evolved from different ancestors and yet posses similar characteristics.

6 0
3 years ago
Which of the following sentences best describes osmosis?
bearhunter [10]

Answer:

D is the correct Answer

Explanation:

it is D because there is a difference bewtween them so watch what you selected please

6 0
2 years ago
Which statement correctly summarizes Wegener’s theory of continental drift?
GuDViN [60]

The correct answer would be D), over millions of years, Pangaea broke apart and drifted to form the seven continents.

7 0
3 years ago
Read 2 more answers
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